HistogramDialogComboBoxItem.cxx

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#include "HistogramDialogComboBoxItem.h"
#include <vector>

//-------------------------
//Constructor
//-------------------------
HistogramDialogComboBoxItem::HistogramDialogComboBoxItem()
{

        _bar_width = 30;
        _bar_height = 20;
        

        colorBar_Bitmap = new wxBitmap(_bar_width,      _bar_height);

}
HistogramDialogComboBoxItem::HistogramDialogComboBoxItem( int bar_width,int bar_height)
{

        _bar_width = bar_width;
        _bar_height = bar_height;

        //_maxgreyvalue = maxgreyvalue;

        colorBar_Bitmap = new wxBitmap(_bar_width,      _bar_height);

}
HistogramDialogComboBoxItem::~HistogramDialogComboBoxItem(){
        
        
}
void HistogramDialogComboBoxItem::SetColors(std::vector<double> greyvect, std::vector<double> redvect, std::vector<double> greenvect, std::vector<double> bluevect){

        _greyvect=greyvect;
        _redvect=redvect;
        _greenvect=greenvect;
        _bluevect=bluevect;

        wxMemoryDC temp_dc;
        temp_dc.SelectObject( *colorBar_Bitmap );               
        temp_dc.SetBrush(wxBrush( colourParent ,wxSOLID  ));
        temp_dc.SetPen(wxPen( colourParent,1,wxSOLID  ));
        
        temp_dc.DrawRectangle(0, 0, _bar_width, _bar_height);
        temp_dc.SetPen(wxPen( wxColour(167,165,191),1,wxSOLID  ));
        temp_dc.DrawRectangle(0, 0, _bar_width, _bar_height);   

        double initial_r, initial_g, initial_b; 
        double next_r, next_g, next_b;
        double initialgreyv=0, nextgreyv=0;
        
        for (int i =0; i < _redvect.size(); i++){
                initialgreyv = nextgreyv;
                initial_r = _redvect[i]*255.0;          
                initial_g = _greenvect[i]*255.0;                
                initial_b = _bluevect[i]*255.0;         

                if(i < _redvect.size()-1){
                        nextgreyv = _greyvect[i+1];
                        next_r = _redvect[i+1]*255.0;
                        next_g = _greenvect[i+1]*255.0;
                        next_b = _bluevect[i+1]*255.0;            
                }else{
                        nextgreyv = 1;  
                        next_r = initial_r;
                        next_g = initial_g;
                        next_b = initial_b;
                }

                int ini_pixelX=_bar_width*initialgreyv;
                int end_pixelX=_bar_width*nextgreyv;            

                double m_scope_r = (double)(next_r-initial_r)/(end_pixelX-ini_pixelX);
                double m_scope_g = (double)(next_g-initial_g)/(end_pixelX-ini_pixelX);
                double m_scope_b = (double)(next_b-initial_b)/(end_pixelX-ini_pixelX);

                next_r = initial_r;
                next_g = initial_g;
                next_b = initial_b;

                for (int Xi =ini_pixelX; Xi<= end_pixelX; Xi++)                                         
                {
                        temp_dc.SetBrush(wxBrush( wxColour(next_r, next_g, next_b),wxSOLID  ));
                        temp_dc.SetPen(wxPen( wxColour(next_r, next_g, next_b),1,wxSOLID  ));
                
                        temp_dc.DrawLine(Xi, 0, Xi, _bar_height);               

                        next_r = (int)(m_scope_r + next_r);
                        next_g = (int)(m_scope_g + next_g);
                        next_b = (int)(m_scope_b + next_b);                                                     
                }
        }
}

wxBitmap HistogramDialogComboBoxItem::GetBitmap(){
        
        return *colorBar_Bitmap;
}
void HistogramDialogComboBoxItem::SetTransferFunction(std::vector<double> greyvect, std::vector<double> value){
    _greyvecttransfunct = greyvect;
        _value=value;
}